is number in javascript code example
Example 1: javascript check if number
if (Number.isInteger(val)) {
}
if (isNaN(val)) {
}
if (typeof(val) === 'number') {
}
Example 2: js is number
Number.isInteger(value)
Example 3: javascript check if number
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
------------------------
isNumber('123');
isNumber('123abc');
isNumber(5);
isNumber('q345');
isNumber(null);
isNumber(undefined);
isNumber(false);
isNumber(' ');
Example 4: check to see if number is a decimal javascript
The Number. isInteger() method determines whether a
value an integer.
This method returns true if the value is of the type
Number, and an integer (a number without decimals).
Otherwise it returns false.